Optimal Baffle Design in a Cassegrain Telescope

Details Optimal Baffle Design in a Cassegrain Telescope Optimal Baffle Design in a Cassegrain Telescope

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001exa....11..171t&link_type=abstract

Experimental Astronomy, v. 11, Issue 3, p. 171-191 (2001).

Astronomy and Astrophysics

Astronomy

4

Cassegrain, Richter-Slevogt Systemritchey-Chretien System, Telescopes, Cassegrain, Richter-Slevogt Systemritchey-Chretien System, Telescopes

Scientific paper

An exact analytical procedure is described for the optimum design of baffles for any Cassegrain telescope with conicoid type mirrors. Here, `optimum' means the least obstruction coefficient given perfect blocking of direct light by baffles. The corresponding algorithm is based on the ray-tracing formulas in a two-mirror telescope with arbitrary position of the aperture stop. The optimal configuration of baffles is unique. The dependence of the obstruction coefficient upon the telescope characteristics is studied. The optical system can be designed in such a way that the obstruction is equal to a predefined value. As examples, the Hubble Space Telescope and the Ritchey-Chretien system with the obstruction coefficient 0.25 are considered.

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